Tank



FIG. 1 is a top, front perspective view of a tank showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a back elevational view thereof;

FIG. 5 is the other side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a composite metal and plastic tank, as shown and described. 